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Eutypella canker

Eutypella canker - Eutypella canker on sugar maple, caused by <em>Eutypella parasitica</em>.
  • Latin name: Eutypella parasitica R.W. Davidson & R.C. Lorenz
  • French name: Chancre eutypelléen
  • Division: Ascomycota
  • Class: Diatrypales




Eastern Canada

Damage, symptoms and biology

The disease kills only small trees. A perennial canker forms on larger trees, but does not kill them. On these trees, the disease is characterized by an area of dead bark surrounded by a ridge of callus tissue. The fruiting bodies of the fungus develop three to five years after the initial infection on the dead bark remaining on the trunk. Cankers provide a point of entry for decay fungi, making the tree more vulnerable to stem breakage and wind throw.

Other information

A dead branch stub can often be seen in the middle of the canker. Most cankers form less than 4 meters above the ground.

Canadian Forest Service Publications

Eutypella canker

Information on host(s)

Main host(s)

Red maple, sugar maple


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